[nigh-robin??? casually giving you a weird look there but cadmus sounds more interesting.]

... Cadmus? July 4th?

[wait a minute. that sounds... vaguely familiar, he just can't quite place why.]

I dunno, man, it sounds kinda familiar? No idea why, though, I've never been to anywhere called Cadmus with Robin or Kaldur, and definitely not on July 4th.